21120201122112 has 84 divisors (see below), whose sum is σ = 61103011952736. Its totient is φ = 6974272001280.

The previous prime is 21120201122107. The next prime is 21120201122159. The reversal of 21120201122112 is 21122110202112.

21120201122112 is a `hidden beast` number, since 211 + 20 + 201 + 1 + 221 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171279564 + ... + 171402827.

Almost surely, 2^{21120201122112} is an apocalyptic number.

It is an amenable number.

21120201122112 is an abundant number, since it is smaller than the sum of its proper divisors (39982810830624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120201122112 is a wasteful number, since it uses less digits than its factorization.

21120201122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342682516 (or 342682503 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21120201122112 its reverse (21122110202112), we get a palindrome (42242311324224).

The spelling of 21120201122112 in words is "twenty-one trillion, one hundred twenty billion, two hundred one million, one hundred twenty-two thousand, one hundred twelve".